不同灌溉上限对芥蓝水分吸收和利用的影响（英文）

Effect of Different Irrigation Maximums on Absorption and Utilization of Water in Chinese Kale

[目的]明确土壤水分对芥蓝生长和水分利用的影响。[方法]对相同灌溉频率、不同灌溉上限下芥蓝水分吸收和利用的变化规律进行了研究。[结果]土壤水分亏缺极显著降低芥蓝苗期植株、成熟期植株及其各器官的水分含量;芥蓝单株耗水量在土壤A为55%和土壤B为45%处理时最小,分别为2.244和2.235 L/株,比CK节水23.91%和21.14%;水分利用效率分别在土壤A为55%和土壤B为35%处理时最高,分别为6.043和5.958 g/L,比CK提高20.09%和41.72%;灌溉水分生产率二个土壤都在75%处理时最高,分别为40.44g/L和40.49 g/L,比对照提高了5.64%和13.39%。[结论]通过控制灌溉上限能节约芥蓝水分消耗,提高水分利用效率,提高产量和品质。

[Objective] This study was conducted to investigate the effect of soil moisture on the growth and water utilization of Chinese kale. [Method] The law of water absorption and utilization of Chinese kale was researched under the same irri- gation frequency and different irrigation maximums. [Result] Soil water deficit re- duced water contents in plants in seedling stage and in plants and various organs in maturation stage; water consumption of individual plant was the lowest in 55% treatment of soil A and 45% treatment of soil B, which showed the values of 2.244 and 2.235 L/plant, respectively, and saved water by 23.91% and 21.14% compared with CK; water use efficiencies of soil A with a water content of 55% and soil B with a water content of 35% were the highest, i.e., 6.043 and 5.958 g/L, which were higher than that of CK by 20.09% and 41.72%, respectively; and regulated deficit irrigation also improved irrigation water productivity, and the two kinds of soil both showed in 75% treatments the highest irrigation water productivities, i.e., 40.44 and 40.49 g/L, which were higher than that of CK by 5.64% and 13.39%, respec- tively. [Conclusion[ Controlling irrigation maximum could save water consumed by Chinese kale, improve water use efficiency and improve yield and quality.